AoE cards crash when played through distilled chaos

[Tempo-anon]

Error log:

java.lang.NullPointerException
    at com.megacrit.cardcrawl.actions.common.DamageAllEnemiesAction.update(DamageAllEnemiesAction.java:98)
    at com.megacrit.cardcrawl.actions.GameActionManager.update(GameActionManager.java:179)
    at com.megacrit.cardcrawl.rooms.AbstractRoom.update(AbstractRoom.java:325)
    at com.megacrit.cardcrawl.dungeons.AbstractDungeon.update(AbstractDungeon.java:2532)
    at com.megacrit.cardcrawl.core.CardCrawlGame.update(CardCrawlGame.java:876)
    at com.megacrit.cardcrawl.core.CardCrawlGame.render(CardCrawlGame.java:423)
    at com.badlogic.gdx.backends.lwjgl.LwjglApplication.mainLoop(LwjglApplication.java:225)
    at com.badlogic.gdx.backends.lwjgl.LwjglApplication$1.run(LwjglApplication.java:126)

This is because a lot of aoe cards I created are not setting isMultiDamage to true